public class Main {
    public static void main(String[] args) {
        MyQueue myQueue=new MyQueue();
        myQueue.offer(1);
        myQueue.offer(2);
        myQueue.offer(3);
        System.out.println(myQueue.peek());
        myQueue.poll();
        System.out.println(myQueue.size());
        System.out.println(myQueue.isEmpty());
    }
}